class Rectangle extends Model {
	/*ivars
	width
	height*/
	
	//------------------------------------------------
	
	constructor(w, h) {
		super();
		this.width = (w !== undefined) ? w : 0;
		this.height = (h !== undefined) ? h : 0;
		this.setAsNumeric('width', 'height');
	}
	
	//------------------------------------------------
	//Getters (Basic)
	
	getWidth() {
		return this.width;
	}
	
	getHeight() {
		return this.height;
	}
	
	//------------------------------------------------
	//Setters
	
	setWidth(value) {
		this.width = value;
	}
	
	setHeight(value) {
		this.height = value;
	}
	
	//------------------------------------------------
	//Calcs
	
	getArea() {
		return this.width * this.height;
	}
	
	getPerimeter() {
		return 2 * (this.width + this.height);
	}
	
	getDiagonal() {
		const
			w = this.width,
			h = this.height;
		return Math.sqrt(w*w + h*h);
	}
	
	
	//------------------------------------------------
	//Actions
	
	flip() {
		const w = this.width;
		this.width = this.height;
		this.height = w;
	}
	
	multiply(factor) {
		this.width = this.width * factor;
		this.height = this.height * factor;
	}
	
	//------------------------------------------------
	//Common
	
	toString() {
		return '' + this.getWidth() + 'x' + this.getHeight()
			+ ' area=' + this.getArea();
	}

}